Shindaiwa BP520S Operator's Manual page 35

Checking the nylon line cutting head
Maintenance and care
6. When the line is wound to the end hook both line ends into
respective notch of spool for retaining tentatively the line
while leaving line ends approximately 10 cm beyond notch.
7. Align notches of spool for the line with grooves of eyelets
and fit spool into cover.
8. Pull out the line from cover.
(A) Remove the line from "respective notch of spool", and (B)
pass it through "groove of respective eyelet".
9. Fit cover and housing together.
(C) Align "eyelets" of cover with "recesses" of housing, and
(D) press pawls of housing into respective window of cover
until the pawls are firmly fitted into the windows.
Make sure each outer periphery of pawls of housing
spreads almost fully up to the outer periphery of respec-
tive window of cover.
If they are loosely fitted and the cutting head is turned,
cover or inside components can fly off which is danger-
ous.
1. Make sure each periphery of the 2 retaining pawls of housing
spreads almost fully up to the outer periphery of the respec-
tive cover window.
2. Check mount of cutting head on trimmer and tighten if it is
loose.
3. Check the cutter head for deflection or abnormal noise rotat-
ing it by hand.
Deflection or abnormal noise can cause abnormal vibration
to occur or mount to trimmer to loosen during rotation which
is dangerous.
35
DANGER